The American sailors who were detained by the Iranian navy last winter divulged a host of sensitive information to their captors, according to a scathing U.S. Navy report released Thursday.

Some of the 10 crew members detained at gunpoint in the Persian Gulf last January improperly revealed passwords to their phones and laptops, as well as operational details of their vessels, the report said.

One crew member disclosed to his Iranian interrogators the top speed of his vessel and that it carried out “presence” missions.

"It is clear that some, if not all, crew members provided at least some information to interrogators beyond name, rank, service number and date of birth," the report said.